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1. A boy whirls a stone in a horizontal circle 1.6m above the ground, by means of a string 1.4 m long. The angle between the string and horizontal plane is 10o. The string breaks and the stone flies of horizontally. It strikes the ground at the point that is 6 maway horizontally.
What was the centripetal acceleration of the stone while in circular motion?2. A diver springs upward from a board that is threemeters above water. At an instant he contacts the water his speedis 9.20 m/s and his body makes an angle of 78.0o with respect to the horizontal surface of the water.
(a) Determine his initial velocity (magnitude anddirection).
(b) What is his maximum height above the watersurface?(c) Find the horizontal distance between hisinitial and final points.
A charge of 2.19 µC is held fixed at the origin. A second charge of 2.19 µC is released from rest at the position (1.15 m, 0.470 m) . If the mass of the second charge is 2.10 g, what is its speed when it moves infinitely far from the origin?
The isotope shift of spectral lines refers to the shift in wave- lengths (or frequencies) due to the different masses of given ele- ments. Find the isotope shifts for each of the four visible Balmer series wavelengths for deuterium and tritium compar..
An 8,000 rocket is shot straight up from the Earth's surface with the initial speed of 800 m/s. How high does it go.
Water flows straight down from an open faucet. The cross-sectional area of the faucet is 1.7 × 10-4m2, find the cross-sectional area of the water stream at a point 0.11 m below the faucet
A 2.0 kg ball is thrown at the suspended 29.4 kg block with a velocity of 3.5 m/s. The coefficient of restitution between the ball and the block is e = 0.69. What is the maximum height h to which the block will swing? (mm)
A 500-turn circular coil with an area of 0.500 m^2 is mounted on a rotating frame which turns at a rate of 20.0 rad/s in the presence of a 0.500 T uniform magnetic field that is perpendicular to the axis of rotation
A state highway patrol car radar unit uses a frequency of 8.00×10^9Hz. What frequency difference will the unit detect from a car receding at the speed of 44.50 from a stationary patrol car.
A large window measures 1.8m by 3.2m . At what rate will heat be conducted through the window when the room temperature is 27C and the outside temperature is 0C if the window consists of a single pane of glass 4.4mm thick. (Assume that there is a con..
An 8-kg ball hanging from the ceiling by a light wire 135cm long is struck in an elastic collision by a 2 kg ball moving horizontally at 5.00 m/s just before the collision. Find the tension in the wire just after collision.
You are standing on the ground at the origin of a coordinate system. An airplane flies over you with constant velocity parallel to the x axis and at a constant height of 9.00 103 m. At t = 0, the airplane is directly above you so that the vector l..
A car (mass = 1060 kg) is traveling at 39 m/s when it collides head-on with a sport utility vehicle (mass = 2380 kg) traveling in the opposite direction. At what speed was the sport utility vehicle traveling
An oil drop carries one excess electron and weighs 9.3 x10-15 N. What electric field strength is needed to suspend the drop so it is motionless.
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